The only exception to this rule is a window in the south aisle of the Cathedral choir, which contains parts of a Jesse Tree, in which the blue is combined with some very beautiful rich dark greens and a strong orange stain. Mr. Westlake thinks the glass is not York work at all. To me it seems not quite impossible that it is the work of John Thornton himself, the use of the deep orange stain in the east window being very similar. There is, however, no certainty of his authorship of any existing window but the east window. The glass in the Guildhall of Coventry is sometimes claimed for him, but I do not know of any evidence for it, and as it contains a portrait of Henry VI. as a grown man it can hardly be much earlier than 1440, thirty-five years later than the east window at York. [Sidenote: The St. William and St. Cuthbert windows.] Next to the great east window, the most important windows in the choir are those which fill the two choir-transepts, and which tell the histories respectively of St. William of York and St. Cuthbert. They are only five lights wide, but extend upwards to the full height of the church, and have double tracery and galleries like the east window. Except for their prevailing red and blue colouring, their general design resembles that of the east window, the whole window being divided, in the same way, into a series of small square subject panels with a short many-pinnacled canopy just filling the head of each light. The St. Cuthbert window, however, has, in addition, a life-size figure of the saint, which occupies two panels in the middle of the window. The two windows are evidently by the same hand, but the northern or St. William window is a good deal the older, having been presented, as it would seem from the portraits it contains, by Baron Ros of Hamlake about 1420, while the St. Cuthbert window cannot have been given till after 1426, and probably not till 1430 or later. No doubt, however, the execution of the first window would occupy a large part of the intervening time. Of the two, I rather prefer the effect of the St. William window, to which the larger amount of dark blue in the monks' dresses gives greater depth and richness, but the St. Cuthbert window shows perhaps more accomplishment in drawing. It is a fascinating occupation on a bright day to trace, with the aid of a strong field-glass, the stories unfolded in these rows upon rows of pictures in glass, to which a key may be found in monographs on the two windows, by the Rev. J. T. Fowler and his brother, published in the _Yorkshire Archæological Journal_, vols, iii.-iv. [Illustration: PLATE XLV HEAD OF PATRIARCH, FROM WINDOW IN SOUTH AISLE OF NAVE, ST. PATRICE, ROUEN Fifteenth Century] [Sidenote: St. Martin's, Coney Street.] [Sidenote: All Saints', North Street.]